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C372M ULTRASONIC PULSE VELOCITY TESTER, HIGH PERFORMANCE

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WITH MICROPROCESSOR FOR COMBINED ULTRASONIC AND REBOUND HAMMER DATA ACQUISITION AND PROCESSING
STANDARDS: EN 12504: part 4 | BS 1881:203 | ASTM C597 | NF P18-418

MAIN FEATURES
Touch screen LCD display 800×480 pixel.
Windows operating system like a standard PC.
Flash memory 128Mb, expandable with SD card to
illimited memory.
Time measuring from 0 to 9999,9 μS resolution.
Possibility to combine the ultrasonic measurement
with rebound index (SonRed method).

This is an instrument using the most modern technologies; it has
a 7″ WVGA colour touch screen, 128 MB, SD card, USB, working
system Windows CE.
Ultrasonic tests:
The appliance allows measuring the ultrasonic impulse speed
inside the material (by knowing the distance between the probes).
It measures the distance between the probes (by knowing the
speed of the ultrasonic impulse to go through the tested material).
It measures the required time by the ultrasonic impulse to go
through the tested material.
Young’s modulus for soils is also measured (by knowing the
distance between the probes, the density of the tested material and
the shear-speed).

Young’s modulus for concrete is measured by knowing the distance
between the probes, the density of the tested material and the
poisson ratio.
Calculation of the crack depth.
Zero calibration with depuration of the time for the impulse to go
through the probes.
Calibration of a defined time value.

Infinite filing capacity of the test dates and the graph tracing of the
tests on SD card or extractable and expandable.
Possibility to use the instrument with two exponential probes, or
with one standard probe and one exponential probe.
Possibility to connect the instrument to internet for consultations or
extractions, like a common PC.
Visualization of the shape of the transmitting wave while it goes
through the material checked, by transforming the instrument into a
real oscilloscope.
Combined ultrasonic and rebound hammer determination
(sonreb method):
The C372M ultrasonic tester houses an integral data logger for data
acquisition, processing and store of rebound hammer values.
The acquisition of the rebound values is performed with manual or
automatic mode.
a) Manual mode:
Rebound values measured with a standard concrete hammer are
manually input into the ultrasonic Tester.
b) Automatic mode:
The digital Matest test hammer mod C386N is directly connected
to the ultrasonic tester through a cable. The measured rebound
values are automatically transmitted to the C372M tester.
The measures of the velocity of ultrasonic pulses and the rebound
values, gives estimates of dynamic modulus of elasticity and Poisson’s
Ratio, and provides informations on possible voids, cracks and
strength of the structure.
It is possible to evaluate the compressive strength of the concrete,
useful to estimate formwork striking times.
The combined test allow to rectify different inaccuracies that are
typical of the simple rebound hammer test, and obtaining estimates
on the compressive strength of the concrete, that cannot
be obtained with the ultrasonic test, granting high accuracy and
reliability of the results.
The standard appliance includes:
Instrument in basic configuration (ARM Cortex-AS
400MHz, 128 MB Flash Memory, 128 MB Ram) in a
practical and elegant palmer container.
Two 55 kHz probes with connecting cables.
Calibrating cylinder and contact paste
Strong anti shock case holding the instrument and
the accessories.
Battery pack Li-Ion 11.1V 3000mA.h
External feeder 230V/24V and battery charger
Dimensions: 400x300x180 mm
Weight: 3 kg approx.

ACCESSORIES
C370-08 EXPONENTIAL TRANSMITTING/RECEIVING PROBES
(couple), 55 kHz Nominal Frequency.
C372-10 TRANSMITTING/RECEIVING PROBES (couple), 150
kHz Nominal Frequency, indicated for homogeneous,
compact, high density concrete.
C372-11 TRANSMITTING/RECEIVING PROBES (couple), 24 kHz
Nominal Frequency, indicated for heterogeneous, low
density concrete.
C370-09M COUPLE OF CABLES (each 10 m long) to connect the
probes to the tester.
Used to test voluminous/large structures.
SPARES
C370-02 Transmitting/receiving probes (couple), 55 kHz
C370-04M Couple of cables (each 3.5 m long) to connect the
probes to the tester.
C370-07 Tube of grease to better coupling the probes to the
material under test.

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